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New York - Liberty Media boss Greg Maffei has hinted Formula 1 needs to make changes to its current engine regulations.

Earlier in March, FIA president Jean Todt ruled out a return to screaming V8, V10 or V12 engines, declaring it would "not be accepted by global society".

"Race weekends must be exciting"

But the volume of the current 'hybrid' power units remains highly controversial, and apparently has not escaped the notice of the sport's new owners.

"Yes, there are some things to do around the engines, there are some things to do around the DRS system, there are a few things to do to try to balance the amount of money the teams get," Liberty chief executive Maffei is quoted by the Spanish sports newspaper AS.

He also revealed that moves are afoot to bring back some European circuits that have become lost to the F1 calendar.